Verb 'stretch' usage.
Hello, folks!
please read blow sentences.

These days, many restaurants stretched the truth of their food by posting pictures that are not real.

the government stretched its outcome by concealing weakness.

I made them up .
I'm wondering if it makes sense or there are any good expressions even words.

Question

Verb 'stretch' usage.
Hello, folks!
please read blow sentences.

These days, many restaurants stretched the truth of their food by posting pictures that are not real.

the government stretched its outcome by concealing weakness.

I made them up  .
I'm wondering if it makes sense or there are any good expressions even words.

Answer

I agree with James and his example is a good one.

I recommend that you search "stretch the truth" in sentence databases like fraze.it and study its usage.

In the second sentence, you may have meant: The government exaggerated the success of its outcomes by concealing some shortcomings.

Answer

Unfortunately, neither of your examples is correct.  This is a hard concept.  Stretching the truth basically means lying about something.

For example, the president was stretching the truth when he said 6 million people attended his inauguration.